How do I know what size picatinny rail fits on my ar15

Discussion in 'AR-15 Discussion' started by armed1212, Sep 8, 2012.

  1. armed1212

    armed1212 New Member

    201
    0
    0
    I have a rra car4 wat size rail does it use. my first ar still learning
     
    Last edited by a moderator: Sep 11, 2012
  2. Quentin

    Quentin New Member

    7,551
    1
    0
    Need to read your manual. wat size gas system you got?

    *Groan* :D
     

  3. armed1212

    armed1212 New Member

    201
    0
    0
    Its a 16in barrel, n I measured the hard guard and it measures 6 1/2 or so inchs,
     
  4. Quentin

    Quentin New Member

    7,551
    1
    0
    So you have the carbine length gas system? What front sight do you have? What kind of rail do you want? FF or will you just get the handguard replacement style? Gotta start reading (stickys), and more importantly shooting, at least a few hundred rounds before upgrading parts.
     
  5. armed1212

    armed1212 New Member

    201
    0
    0
    I have gone to the range a couple times n have ran 300rounds or so thur it. Id like a drop in quad rail. Jus not sure the size.
     
  6. Quentin

    Quentin New Member

    7,551
    1
    0
    7" - assuming you have 7" handguards and a standard end cap on a standard A2 style FSB/gas block.

    But make sure that's really the case before buying anything. You might want to post a picture to help us tell.
     
  7. okdonk

    okdonk New Member

    2,821
    0
    0
    I'm guessing its 7".
     
  8. armed1212

    armed1212 New Member

    201
    0
    0
    ForumRunner_20120909_104247.jpg



    ForumRunner_20120909_104225.jpg

    it measures about 6 and a half inches when I put a ruler to the handguard
     
  9. Gatoragn

    Gatoragn Active Member

    3,937
    13
    38
    You would need to acquire a Carbine length two piece drop in rail to make a change without removing the front sight/gas block.

    Diamondhead, Yankee Hiil, Midwest Industries, and many other folks make the rails you describe.

    Magpul makes a hand guard to which you can attach rails also.

    You are in the early stages of BRD.




    Black Rife Disease.

    Enjoy your Sport Utility Rifle.
     
  10. okdonk

    okdonk New Member

    2,821
    0
    0
    Get Daniel Defense Rail.. buy once cry once :)
     
  11. ryguy00

    ryguy00 New Member

    294
    0
    0
  12. armed1212

    armed1212 New Member

    201
    0
    0
    It looks good, so,there really isnt a big difference between the 40$ one n some that r up over $100 as long as they r made of same material?
     
  13. armed1212

    armed1212 New Member

    201
    0
    0
  14. ryguy00

    ryguy00 New Member

    294
    0
    0
    I will say this: the $40 rail was easier to install, feel like better quality in my hand, has numbered rails, and cross bolts for extra strength than my $140 yankee hill machine rail.

    My yankee hill machine rail required some fitting and filing to install, has fake cross bolts, does not have numbered rails, and provides a rock solid mount.

    The gmg rail required no modification to install, has reinforcing crossbolts, has numbered rails, provides a rock solid mount.

    The yhm rail is of excellent quality, but i prefer the gmg rail based on features and price

    Ive never had a single problem with my yhm rail. I own one. And will never buy another. I have never had a single problem with my gmg rail, i own 4 for different rifles. If i need another, it will be gmg.
     
    Last edited: Sep 10, 2012
  15. armed1212

    armed1212 New Member

    201
    0
    0
    Thanks, think im getting that one
     
  16. ryguy00

    ryguy00 New Member

    294
    0
    0
  17. armed1212

    armed1212 New Member

    201
    0
    0
    Now my understanding us that u may loss some accuracy when using a drop in rail, is this correct n how bad?
     
  18. ryguy00

    ryguy00 New Member

    294
    0
    0
    No, this is not correct
     
  19. armed1212

    armed1212 New Member

    201
    0
    0
    So what would be the difference in performance between ff and drop in?
     
  20. Quentin

    Quentin New Member

    7,551
    1
    0
    I doubt you would see much difference.